Boiler-setting



(No Model.)

. T. POORE.

BOILER SETTING.

Patented July 5, 1887.

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UNITED STATES PATENT OFFICE.

TOWVNSEND POORE, OF SORAN'ION, PENNSYLVANIA.

BOILER-SETTING.

SPECIFICATION forming part of Letters Patent No. 365,858, dated July 5,1887,

Application filed October 20, 1886. Serial No.216,71l7. (No model.)

To all whom it may concern:

Be it known that I, TOWNSEND POORE, a citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented certain new and useful Improvements inBoiler-Settings and Boilers; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to boiler-settingsfor cylindrical boilers; and itconsists in a novel construction of a boiler-setting, by whichareturn-draft passage isprovided for the purpose Figs. 3 and 4- aresimilar views of modified constructions, and Fig. 5 is a side elevationof a boiler and vertical section of the improved setting provided withan endless grate for burning culm.

The letter A in the drawings represents an ordinary cylindrical boilerwithout tines; B, a grate; (J, fire-bridge; D, smoke-stack, and Efurnace. The boilers A are of ordinary construction, and are of theclass generally and preferably used in the coal regions, where culm canbe easily and cheaply procured. As the gas combustion of such fuel iscomparatively slow, most of the heat produced thereby goes up into thesmoke-stack, and is lost in the old construction of boilers andboiler-settings, unless the boilers are made of very greatlength. Theefforts made-to avoid this loss by using very long boilers of smalldiameter has only proved a partial success, as thelongest boilers known(being about fifty feet) are not sufficiently long to absorb all theheat and to cover the whole'available combustion area, while theexpansion and contraction of such boilers are so great as to render thesafety and utility of their use doubtful. I therefore make the boilers Aof about half the length of the computed combustion and draft area, andarrange the said boilers in two sets side by side, as seen at A A, andplace a dividing-wall, c, be-

tween thesame, which wall with the outer.

walls, 0, forms the fire and draft chambers of the boiler-setting. Thefirst set of boilers, A. is exposed to the fire and heat of the grate Band firebridge C, while the second set, A, is exposed to the heat of thegases leaving the first set of boilers and having their combustionfinished while passing under said second set to the chimney orsmoke-stack D. Each of said boilers is provided with a steam-dome, a,and an ordinary steam-pipe or a steam-drum, by means of which they maybe united, in order to deliver the steam to the engine of anestablishment.

In Fig. 2 I have shown an arrangement of six boilers-two boilers, A A,at either side of two boilers, A A, which latter absorb the heat of thereturn draft, and therefore are termed return-draft boilers. Thesereturn draft boilers A are generally set farther back than the boilersheated direct from the fire of the grate, in order to leave roomv for achamher, a, below the chimney or smoke-stack D, from which chamber theproducts of combustion enter the chimney with facility. The heads or enda" of the boilers A project through the back wall,c,of the furnace inthe same manner as the heads or front ends, a, of the boilers A projectthrough the front wall, 6", of the same, for the purpose of facilitatingthe inspection and repairs of the boilers by means of man-holesin theirends.

' The passages c between the intermediate walls, e, and back wall, 0',may be provided with dampers F,swinging on vertical hingesf, orotherwise suitably applied, whereby either one of the. said passages maybe closed, as the dotted lines indicate, if anything should happen tothe main boilers A, at one or the other side, whereby they would bedisabled. This construction will not be necessary if each set of mainboilers has its own return-flue, the two return-flues being separated bya central dividing-walheias seen in Fig. 8. By this construction thereturn drafts of the two sets of main boilers are prevented frominterfering with each other, which cannot be quite pre vented by the useof the dampers F.

The construction represented by Fig. 4. can

- tion.

be regarded as one half or one side of Fig. 3, and its operation answerscompletely that of either part divided by the center wall, a.

In Fig. 5 an endless grate, B, fed from an archway and adapted forburning culm, is shown in connection with my I present invention. Thefuel known by the name of culm necessitates a powerful draft, which isprocured by means of ordinary blowcrs,the air-channels of which areshown at f in see- A blower,F,is also shown in the smokestaek. Thenumber of boilers A and A used in one setting is not limited,and is inpractice determined in accordance with the services required of theplant.

My invention,.altl1ough especially intended for culm-burningboilerfurnaces, is suitable for all kinds of fuel, and the simplicity ofits construction renders it very effective and easy to construct,operate, and keep in repair.

By arranging the boilers and their settings in the I manner hereindescribed the draftchimney or smokestack is only about half the distancefrom the fire that it would be if the boiler were made in one length of,say, about fifty feet, and therefore is more effective upon the fire onthe grate, and the boiler-setting andboiler can be constructed in a muchshorter and a very little Wider space, and thus room economized anddamage by expansion and contraction avoided, and everything renderedmore compact, while the operation is more perfect and the structuresafer and more enduring.

The dampers F may be constructed to slide up and down, instead of toswing, as shown.

\Vhat I claim as my invention isp 1. The boilersetting comprising outerside,

- front, and back walls, e e 0 and one or more in combination withsteam-boilers A A, the

boilers A extending through the front wall and terminating at the rearend of the intermediate wall, and the boiler A passing through therear'wall, e, and terminating slightly in rear of the chamber a at thesmoke stack, substantiall y as and for the purpose described.

2. The combination of the boiler -setting comprising two forward ordirect and a return flue between intermediate walls, 6 6, outer sidewalls, 6, and front and rear walls, 6 6 passages a, grates B, chamber a,stack D, and the dampers F, in combination with boilers A on the leftand right hand side of the return-fiue, and a boiler, A,.the boilers Aterminating at the" rear ends of intermediate walls, 6 e, and the boilerA terminating slightly in rear of chamber a, substantially as and forthe purpose described.

In testimony whereof Iaffix my signature in presence of two witnesses.

, TOWNSEND POORE.

\Vitnesses:

E. F. BOYLE, T. P. HOBAN.

